Referral credit advise

Hi.
I had 2 friends sign up, one the 21st and one the 22nd. The first one topped up and got her reward credit on Thursday, however im still waiting for both rewards to be sent to me. We are both on prepayment and ive referred Quite alot of people and never had this issue before. Ive always received it a day or 2 After The switch has completed.

If anyone could help that would be fab. Thank you xx